TermTest1 KEY written

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University of Toronto *

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202

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Biology

Date

Dec 6, 2023

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pdf

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3

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BIO202 TERM TEST 1 CROWDMARK BOOKLET October 16, 2023 KEY 1 pt each for each label L-1. Label the structures in the text boxes provided and draw an arrow that indicated blood flow direction across the part of the structure below that functions for gas exchange. L-2. Label the following characters on the phylogeny below: tidal flow , four-chambered heart , malpighian tubules , counter-current gas exchange , and chloride cells . BIO202_Term Test1_Crowdmark Booklet_TO HAND IN_ KEY Tidal flow 4-chamber heart chloride cells counter- current malpighian tubules counter- current counter- current
SHORT ANSWER QUESTIONS (5 points). Answer only ONE of the two possible short answer questions in the allocated space. CIRCLE the question you have chosen to answer and leave the one you have not chosen blank. You can use the blank space on your multiple choice booklet to write a draft of your answer. However, your final answer must be provided only in the allocated space with the question you circled in this Crowdmark booklet. Use a PEN to answer the short answer question of your choice. 1 pt each for good description for each bolded term. Description should include a brief explanation or at least connection with another term in the question so that overall, the question is answered well. The samples below are one way of approaching answering the question. SA-1. Write a paragraph for an introduction of a lab on oxygen dissociation curve (your Lab 1). In your introduction paragraph, use the following terms: oxygen , pO 2 , pH , hemoglobin , and dissociation/dissociate . The level of oxygen perfusion of transport in the body in different animals is predominately determined by the pressure contributed by oxygen to the total pressure of mixture of gases or the partial pressures of oxygen ( pO 2 ). The pO 2 levels determine how much oxygen the body’s respiratory pigment, for example hemoglobin , can carry: the higher the pO 2 , the more oxygen is associated with or loaded onto the hemoglobin. An important factor affecting the perfect of oxygen saturation of hemoglobin in the body is the amount of hydrogen ions or pH of the fluid carrying the respiratory pigment. When the region in the animal body is functioning in lower pH due to higher metabolic demand and increased carbon dioxide concentration in the body (the higher the amount of H ions or the higher the acidity), oxygen will dissociate more readily from hemoglobin at the same pO 2 in normal pH conditions. BIO202_Term Test1_Crowdmark Booklet_TO HAND IN_ KEY
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